commands: add response types for multiple commands

src/commands/queue/plchanges.rs

@@ -1,6 +1,7 @@
 use serde::{Deserialize, Serialize};
 
 use crate::{
+    DbSongInfo, Priority, SongId, SongPosition,
     commands::{Command, CommandRequest, CommandResponse, RequestParserError, ResponseParserError},
     common::types::{PlaylistVersion, WindowRange},
     request_tokenizer::RequestTokenizer,
@@ -59,7 +60,15 @@ impl CommandRequest<'_> for PlChangesRequest {
 }
 
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
-pub struct PlChangesResponse;
+pub struct PlChangesResponse(Vec<PlChangesResponseEntry>);
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+pub struct PlChangesResponseEntry {
+    pub position: SongPosition,
+    pub id: SongId,
+    pub priority: Option<Priority>,
+    pub song_info: DbSongInfo,
+}
 
 impl CommandResponse<'_> for PlChangesResponse {
     fn from_response_enum(response: crate::Response) -> Option<Self> {